Question: When did Reinhold Messner stop being Sabine Stehle`s partner?
Paraphrase: When did Sabine Stehle and Reinhold Messner split?
SPARQL (Wikidata): SELECT ?value WHERE { wd:Q189307 p:P451 ?s . ?s ps:P451 wd:Q28053617 . ?s pq:P582 ?value}